thin, pale brownish red by TL, persistant for some time and then
flaking away in small pieces, ± shining.

Columella

None.

Capillitium

of 3-4 µm broad tubules, only fixed at center of calyculus,
hardly expanding, medium dense to dense netted, almost smooth towards
base, with gradually more prominent ornamentation towards apex,
in apical part with rings, halfrings and smaller and less well defined
elements, some logitudinally interconnecting lines, ornamentation
may be rather high, up to 2-3 µm, occasionally spiny.

Arcyria helvetica is generally considered a species of cooler climates,
temperate to subarctic, in central Europe often in the mountains.
The Danish locality is near sea level, but in close connection with
the dunes along the North Sea. In Denmark such areas are well known for
finds of subalpine species, such as Sarcoletia globosa and Multiclavula
vernalis.

Description

Description based on the only, very scarce, Danish collection: SA_TL2015-719192.